#define  _CRT_SECURE_NO_WARNINGS
bool isSameTree(struct TreeNode* p, struct TreeNode* q) {
    if (p == NULL && q == NULL)
    {
        return true;
    }
    if ((q == NULL) || (p == NULL))
    {
        return false;
    }
    if (p->val != q->val)
    {
        return false;
    }
    return isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
}